30-60-90 Triangle
Definition: a triangle in which the length of the hypotenuse is 2 times the length of the shorter leg, and the length of the longer leg is the length of the shorter leg times sqrt(3).
Symbol/Notation: none
Statement: The triangle shown above is a 30-60-90 Triangle, because it meets all the requirements for one; the length of the longer leg is the sqrt(3) times the length of the shorter leg, which is 3, and the hypotenuse, which is 6 units long, is double the length of the shorter leg.